Hydraulic pump



FIG. 1 is a front, top and right-hand side perspective view of a hydraulic pump comprising a new, original and ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right-hand side view thereof;

FIG. 5 is a left-hand side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line portion of the figure drawings is included to show portions of the article that form(s) no part of the claimed design. 

CLAIM The ornamental design for a hydraulic pump, substantially as shown. 